GUAVIARE RIVER ARIARI RIVER GUAYBERO RIVER Middle Guaviare Upper Guaviare Lower Guaviare b b c + San José del Guaviare Fuente de Oro Inírida Lejanías Guaviare River Report card 2016 The Guaviare River originates in the Andes is the longest tributary in the Colombian portion of the Orinoco River (1,652 km). Due to its length and varied land uses, the Guaviare sub-basin has been split into three reporting regions for this assessment, the Upper, Middle, and Lower Guaviare. The basin includes a variety of ecosystems, with flooded savanna as the dominant type, followed by seasonal savannas, humid paramos, and Andean rainforest. Main threats to the sub-basin include deforestation for expanding agriculture; exploitation of natural resources from hunting, fishing, and illegal farming; and pollution from mining. The Guaviare River Basin received an overall area-weighted average grade of B- (64%), with the Upper Guaviare receiving a C+ (56%), and the Middle and Lower Guaviare receiving a B (70% and 69%, respectively). There was a mix of moderate, good, and excellent results for the ten indicators assessed. Overall basin scores ranged from as low as 45% for water quality and human nutrition, to 95% for water supply and demand. Overall the sub-basin had excellent scores for risk to water quality (90%), water supply and demand (95%), natural land cover (85%), stable forest area (87%), and ecosystem services (82%). However the overall score for the entire sub-basin, is not representative of each of the three reporting regions, Characteristics of the Guaviare River Basin A spectacular basin in transition Biodiversity Knowledge Gap Index River dolphins Water quality index Risks to water quality Water supply & demand Human nutrition Mining in sensitive ecosystems River dolphins Terrestrial connectivity Natural land cover Stable forest area Ecosystem services & L A N D S C A P E S E C O S Y S T E M S W A T E R C U L T U R E P E O P L E & B I O D I V E R S I T Y G O V E R N A N C E M A N A G E M E N T / G U A V I A R E R I V E R B A S I N H E A L T H B - with very poor scores in the Upper Guaviare for terrestrial connectivity (23%) and water quality (35%). Mining for construction materials and limestone in and around the Ariari River, near the Macarena Range, is likely contributing to both the poor water quality observed in the Upper Guaviare, as well as the lowest score for stable forest area (76%) in the entire Orinoco River Basin. What do the scores mean? 40–60% c 60–80% b 80–100% a 20–40% d 0–20% f no data